T Bolt Hose Clamp

M5/6/8 Head 18-24mm Band Width Smooth Inner

PTB122130-ASH

£3.70

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Address

Silicone Hose UK

HolmeBank Business Park, Station Road
Unit 5
Mirfield WF14 8NA
United Kingdom

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Opening hours

Monday	07:00 – 19:00
Tuesday	07:00 – 19:00
Wednesday	07:00 – 18:00
Thursday	07:00 – 18:00
Friday	07:00 – 17:00
Saturday	07:00 – 13:00
Sunday	Closed

Bank holidays may affect our opening hours and delivery times.

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T-Bolt Hose Clamp is a heavy-duty fastening solution designed for secure and reliable clamping of hoses in automotive, agricultural, marine, and industrial systems. Manufactured from zinc-plated and stainless steel, the clamp provides excellent corrosion resistance, durability, and high clamping force. Featuring a robust solid steel band and precision-engineered T-bolt with a hex nut fastener, the clamp ensures a tight and even distribution of pressure around the hose, reducing the risk of leaks, blow-offs, and slippage. With an operating temperature range from -60°C to +180°C (peak +190°C), T-Bolt Hose Clamps are suitable for high-performance environments where strength and stability are critical.

Key Features:

Material: Zinc-plated or stainless steel for high strength and corrosion resistance.
Design: T-bolt fastening with hex nut for secure, even clamping force.
Band Width: 18 mm to 24 mm depending on size.
Screw Size: M5 to M8 bolts for a wide clamping range.
Torque Capacity: 6 Nm to 24 Nm depending on size.
Operating Temperature: -60°C to +180°C (peak +190°C).
Clip Range: Available in sizes from 17 mm to 130 mm diameter.

The reinforced steel band ensures durability and strength, while the T-bolt design provides superior clamping force compared to standard worm-drive hose clips. The hex nut tightening mechanism allows for precise torque application, ensuring a secure and consistent seal in both low and high-pressure systems. Resistant to corrosion and temperature extremes, these clamps are designed to maintain integrity in harsh environments and under demanding applications.

Applications include securing silicone hoses, turbocharger and intercooler pipework, radiator and coolant hoses, agricultural machinery, heavy-duty vehicles, and marine systems. T-Bolt Hose Clamp offers a reliable and professional-grade fastening solution where standard hose clips may not provide sufficient strength or stability.

Specifications

Type: T-Bolt Hose Clamp
Material: W1 Zinc Plated
Colour: Silver
Standard: W1 / W4

Size Guide

Clip Range Diameter	Band Widthmm	Screw	Break Torque
17mm - 19mm	18	M5 x 40	6
20mm - 22mm	18	M5 x 40	6
23mm - 25mm	18	M5 x 40	6
26mm - 28mm	18	M5 x 40	6
29mm - 31mm	20	M6 x 50	12
32mm - 35mm	20	M6 x 50	12
36mm - 39mm	20	M6 x 50	12
40mm - 43mm	20	M6 x 50	12
44mm - 47mm	22	M6 x 55	12
48mm - 51mm	22	M6 x 55	12
52mm - 55mm	22	M6 x 55	12
56mm - 59mm	22	M6 x 55	12
60mm - 63mm	22	M6 x 55	12
64mm - 67mm	24	M8 x 70	24
68mm - 73mm	24	M8 x 70	24
74mm - 79mm	24	M8 x 70	24
80mm - 85mm	24	M8 x 70	24
86mm - 91mm	24	M8 x 70	24
92mm - 97mm	24	M8 x 70	24
98mm - 103mm	24	M8 x 70	24
104mm - 112mm	24	M8 x 80	24
113mm - 121mm	24	M8 x 80	24
122mm - 130mm	24	M8 x 80	24

Measurements are nominal and may vary slightly.

How to size a clip

1

Measure over the hose, not the pipe

A clip closes around the outside of the hose once the hose is already on its fitting. That outside diameter is the clip size — the bore the hose runs on is not.

2

Or work it out from the hose's own figures

If the hose is not to hand, take its internal diameter and add twice the wall thickness — both are listed in that hose's own Size Guide. A 19 mm bore silicone hose has a 4.5 mm wall, so it measures 28 mm across the outside.

3

Use vernier calipers, keep the largest reading

Set the outer jaws across the widest point of the assembled joint and rotate 60° between readings. Hose is soft and rarely perfectly round, so size to the biggest figure.

4

Pick the range that spans your figure

Aim for the middle of a clip's range rather than either end. Wound out near its limit a clip has little thread left to bite on; at the bottom of its range it may not open far enough to pass over the hose in the first place.

Size the clip to the hose OD, not the bore. A 19 mm hose does not take a 19 mm clip — with a 4.5 mm wall it measures about 28 mm across the outside. Every figure on this page is the outside diameter the clip closes on.

Construction

Material

Zinc-plated or stainless steel

High strength and corrosion resistance

Design

T-bolt fastening with hex nut

Secure, even clamping force · -60°C to +180°C (peak +190°C)

Even pressure. All the way round.

A solid band and T-bolt, for boost joints and big-bore hose.

CLAMPING RANGE

17mm to 130mm

RATED

−60°C to +180°C

MATERIAL

W1 Zinc or W4 Stainless

BREAK TORQUE

6 to 24 Nm

BAND WIDTH

18mm to 24mm

PACK SIZES

1, 10, 50 or 100

How it's built

What it's made of.

Made from zinc-plated or stainless steel.

1

Material

Zinc-plated or stainless steel

High strength and corrosion resistance

2

Design

T-bolt fastening with hex nut

Secure, even clamping force-60°C to +180°C (peak +190°C)

Product gallery

Frequently Asked Questions.

Answers to the questions we’re asked most about sizing, fitment and performance.

Still can't find your answer?

Contact Us

What is it and when do I use it?

A heavy-duty clamp where a solid bolt and trunnion pull a wide, smooth-inner band evenly around the whole joint. That is fundamentally different from a worm drive, which tightens through slots in a perforated band at one point. Use it on boost, intercooler and turbo pipework, and anywhere with real vibration.

What sizes do you stock?

Adjustment ranges run from 17mm to 19mm up to 122mm to 130mm across 23 sizes. Available in 1 clip, 10 clips, 50 clips and 100 clips.

How do I choose the right size?

Size to the outside diameter of the hose once fitted over the pipe, not to the hose bore. Clips are listed by adjustment range and your fitted diameter should sit around the middle of it - a clip at the very end of its travel either will not close far enough or has almost no thread engaged.

What is the difference between W1 and W4?

Available in W1 Zinc Plated and W4 Stainless Steel. W1 is zinc-plated steel - cheaper, fine for dry indoor use. W4 is stainless throughout, band, housing and screw, which is what you want for weather, coolant, road salt or a marine environment.

Why does the smooth inner band matter?

Because silicone is soft. A perforated worm drive band presses its slot edges into the hose wall under high clamping force, which marks and eventually damages it. A T-bolt's smooth band spreads the load evenly, so you can apply the force a boost joint needs without cutting the hose.

How tight should it be?

Firm, not crushed. Compress the hose evenly against the pipe without the band biting in - over-tightening causes more leaks than under-tightening. Re-check after the first few heat cycles, because the joint beds in and a clip that felt tight cold usually needs a small nip.

5 stars: 26 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

T bolt hose clamp

Good quality clamp worked well done up evenly. Would buy again.

Best Clamp Ever

Recently purchased some hose to be used as an exhaust outlet on my boat. Bought a few of these clamps both large and small and they are the best. Far far better and stronger than all others

INCORRECT SIZES

bought some high temperature hose and added the suggested t bolt clamps to the order, they are too small for the pipe.
update....customer support par-excellence. sorted within 20 minutes. now that is excellent service, well done

Fantastic service and product quailty.

Easy to place the order, website recommends which is the correct hose clip dimensions to use with the hoses.

Good product.

Good product, does the job much better than the old worm types.

Top notch clamp

Easy to use and very secure, 10mm socket makes sure of applying enough force to tighten.

Strong hose camp

Good hose clamps / clips. Can be a little tight to fit on the upper end of the size, so suggest going for a larger size than you need.

Great product

Great Quality

T Bolt clamp stopped a hose leaking where a worm drive (Jubilee) type wouldn't and are great value.

Excellent customer service to resolve an unfortunate **** issue

**** lost parcel. ASH sent a replacement but frustratingly this was also lost by the ****. I managed to speak to one of the managers (he called me on a Saturday his day off) who arranged a further replacement which was received next day on the Sunday. Excellent service by the supplier but sadly on this occasion let down by the ****.

Well what a pleasure fitting

Well, what a pleasure fitting good quality kit at a sensible price and not being ripped off on the delivery.
Thanks

T bolt clamp

Good quality excellent service

T Bolt Hose Clamp

Quick delivery

Ordered assortment of clips, good quality.

Bolt clamp

Good clamp did job well will be ordering some more in new year

Power steering hose

The low pressure side of my invincible had corroded, simple fix change out for fully flexible hose with connection tubes and clips at a fraction of the cost of a metal Toyota item.

Heater hoses for my Mk1 Ford Capri.

I really think the hose supplied is fit and forget. Quite thick walled, so won't suit the purists, but seems to be built to nuclear power station specification. Well pleased.

Great Product,Fast delivery

Great service and products
Thanks all

Connecting hose with two clips

Very good product. Fitted pipe securely

Good quality I do recommend!

Thx

Sorted.

After a bit of a slow start, communication with the company has resulted in most of my Order being dispatched. It’s a shame some of the items have been discontinued, but a refund was very quickly returned. Despite the slow start, I’m pleased to have dealt with this company. Worth the wait. Super quality and durability, will do the job nicely.

Reliable trouble free clamping.

If you are looking for a reliable sealing solution logic dictates that it must be 360 degree clamping. The T Bolt Hose Clamps offer this and being available in SS is a bonus in salty conditions.